Great Firewall Leak: 500GB of Source Code Exposes Censorship Tool, Reveals Sales to Foreign Nations
A massive leak of over 500GB of internal documents, including source code and operational manuals, from China’s Great Firewall has exposed the inner workings of its internet censorship system. The files originate from Geedge Networks, a company linked to the development of the Great Firewall, and detail the “Tiangou” platform, a commercial system used by ISPs for deep packet inspection, VPN detection, and full-session logging. This technology has been exported to countries like Myanmar, Pakistan, Ethiopia, and Kazakhstan, enabling mass surveillance and content filtering. Researchers are now analyzing the leak, which includes deployment sheets and build logs, to identify vulnerabilities that could be exploited to circumvent censorship.